code: def step(self, action):
      return (
          self._get_obs(),
          random.choice([0, 1]),
          random.choice([True, False]),
          {},
      )
  
file_path: keras-rl/tests/rl/util.py
imports: import numpy
  import random
  from rl.core import Env
label_desc: Use image node_id 2 for calling the MultiInputTestEnv obj's underlying member method code with example usage: obj.step(action) and returns: self,  random,  random,  dict